Automobile MTBF Evaluation Method Based on Two-dimensional Warranty Data

In order to accurately evaluate the reliability level of automobile based on warranty data, the MTBF calculation method considering the censored characteristics in warranty data and the influence of warranty period is proposed. Two types of censored problems in warranty data are analyzed, and a supplement method for censored mileage based on use intensity and automobile mileage distribution is constructed. Considering the influence of two-dimensional warranty period, the censored mileage is corrected and the calculation accuracy of MTBF is improved. Combined with the actual warranty data of an automobile enterprise, the accuracy and effectiveness of MTBF calculation method are verified and the proposed method can provide support for the evaluation and design of automobile reliability.